在这种情况下,客户端就需要先绑定一个本地端口,以便服务器可以正确地将响应数据发送回客户端。在Linux系统中,可以使用bind()函数来实现端口绑定。 bind()函数的原型为: ```c int bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen); ``` 其中,sockfd是已经创建好的套接字描述符,addr是一个...
# local_address = ('', 12345) # ''表示任何可用的本地IP地址 # udp_client.bind(local_address) 发送数据到服务器: 使用sendto()方法将数据发送到指定的服务器地址。这个方法需要两个参数:要发送的数据(必须是字节类型)和服务器地址(一个包含IP地址和端口的元组)。 python server_address = ('127.0.0....
这里使用“08”作为服务程序的端口,使用“INADDR_ANY”作为绑定的IP地址即任何主机上的地址。 (3)使用bind()把上面的socket和定义的IP地址和端口绑定。这里检查bind()是否执行成功,如果有错误就退出。这样可以防止服务程序重复运行的问题。 (4)进入无限循环程序,使用recvfrom()进入等待状态,直到接收到客户程序发送的...
//udp send#include<stdio.h>#include<string.h>#include<stdlib.h>#include<unistd.h>#include<sys/socket.h>//socket#include<sys/types.h>#include<netinet/in.h>//struct sockaddr_in#include<arpa/inet.h>//inet_pton#include<string>intmain(intargc,char*argv[]){printf("usage: local ip、dst ...
// Bind and listen on port 2000. This constructor creates a socket// and binds it to the port on which to receive data. The family// parameter specifies that this connection uses an IPv6 address.clientOriginator =newUdpClient(2000, AddressFamily.InterNetworkV6);// Join or create a multicast...
(急)udpClient.Receive(refremotePoint)一直提示“在执行此操作前必须先调用Bind方法。” usingSystem; usingSystem.Collections.Generic; usingSystem.Net; usingSystem.Net.Sockets; usingSystem.Threading; usingSystem.Text; usingSystem.Data; usingSystem.Windows.Forms; ...
public static void StartMulticastConversation() { string Ret; // Bind and listen on port 1000. Specify the IPv6 address family type. m_ClientTarget = new UdpClient(1000, AddressFamily.InterNetworkV6); // Join or create a multicast group m_GrpAddr = IPAddress.Parse("FF01::1"); // Use...
// Bind and listen on port 2000. This constructor creates a socket// and binds it to the port on which to receive data. The family// parameter specifies that this connection uses an IPv6 address.clientOriginator =newUdpClient(2000, AddressFamily.InterNetworkV6);// Join or create a multicast...
// Bind and listen on port 2000. This constructor creates a socket// and binds it to the port on which to receive data. The family// parameter specifies that this connection uses an IPv6 address.clientOriginator =newUdpClient(2000, AddressFamily.InterNetworkV6);// Join or create a multicast...
uip_udp_bind(myudp_conn, htons(UDP_ClientPort)); //绑定本地port return TRUE; } else//连接建立失败 { UDP_ClientPort = 0; //本地port udp_client.ClientPort = 0; udp_client.ServerPort = 0; uart_printf("UDP 建立失败!\r\n"); ...